Search String: Display: Description: Sort:

Results:

References: [ +from:K7NV@contesting.com: 112 ]

Total 112 documents matching your query.

21. [TowerTalk] Roihn Guy Bracket GA25GD? (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Fri, 22 Jun 2001 20:46:18 -0700
I'd agree. The bracket reinforces the tower section by connecting all three legs together so the entire tower section shares the guy loads, without the bracing welds to the legs having to do that job
/archives//html/Towertalk/2001-06/msg00533.html (10,611 bytes)

22. [TowerTalk] Roihn Guy Bracket GA25GD? (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Sat, 23 Jun 2001 09:56:25 -0700
Here's what I read in the posts I responded to Steve, SNIP Guy Bracket GA25GD Mounts to tower at any tower at any horizontal brace. Torque bars TB25D (not shown) Optional for use with GA25GD Did eith
/archives//html/Towertalk/2001-06/msg00537.html (9,759 bytes)

23. [TowerTalk] Mast Stress Calc (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Thu, 17 May 2001 12:57:23 -0700
The moment of inertia (I) of the two tubess can be added together as long as they have the same elastic modulus (I.E. both steel tubes). The bending stress formula F=MC/I calculates the stress on the
/archives//html/Towertalk/2001-05/msg00390.html (8,217 bytes)

24. [TowerTalk] Basic Wind Speed and Tower Ratings [Was] Questions on my tower (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Thu, 17 May 2001 13:41:02 -0700
Hi Paul & All, While it is never dangerous to make things stronger than they need to be, it's good to know where the extra safety margin is coming from so we can know if we are really getting it. The
/archives//html/Towertalk/2001-05/msg00391.html (13,869 bytes)

25. [TowerTalk] Angle of maximum wind force on Yagis (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Mon, 21 May 2001 08:12:52 -0700
Hi Gene, The direction of maximum exposed antenna area, hence maximum force developed by the antenna on the support structure, is either with the elements or the boom broadside to the wind, whichever
/archives//html/Towertalk/2001-05/msg00432.html (8,887 bytes)

26. [TowerTalk] Angle of maximum wind force on Yagis (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Mon, 21 May 2001 13:25:52 -0700
Hi Guys, Ok, here's the main difference between what you are thinking and what K5IU pointed out is really happening. The resultant force on a cylinder inclined to the wind is ALWAYS normal to the axi
/archives//html/Towertalk/2001-05/msg00445.html (15,395 bytes)

27. [TowerTalk] Tilting Boom Design (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Sun, 29 Apr 2001 17:04:28 -0700
Hi Mike, The PVRC mount shown in CH 22 of the ARRL Antenna Book does this. But, I'd recommend that it not be left in place all the time. The mast-to-boom offset creates a ton of torque when the boom
/archives//html/Towertalk/2001-04/msg00617.html (8,486 bytes)

28. [TowerTalk] Let's give COMTEK it's earned reputatioin ref10m COMTEK4 sq ... (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Mon, 19 Mar 2001 01:38:53 -0800
Yuri, I'm sure Jim will take good care of you, he is very dilligent and provided me with excellent support during my 4 Square experience. Good luck with your project, I'm sure it will fall into place
/archives//html/Towertalk/2001-03/msg00369.html (7,984 bytes)

29. [TowerTalk] Let's give COMTEK it's earned reputatioin ref10m COMTEK4 sq ... (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Mon, 19 Mar 2001 01:43:41 -0800
Yuri, I'm sure Jim will take good care of you, he is very dilligent and provided me with excellent support during my 4 Square experience. Good luck with your project, I'm sure it will fall into place
/archives//html/Towertalk/2001-03/msg00370.html (7,993 bytes)

30. [TowerTalk] Re: Yagi's (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Wed, 21 Feb 2001 12:57:46 -0800
Snip Snip And... One very cool thing about the new version is that it no longer zeros in on a local optima and stops. Brian made the new one jump off of the local solution and start over again somewh
/archives//html/Towertalk/2001-02/msg00381.html (8,812 bytes)

31. [TowerTalk] Taper schedule for free-standing verticals? (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Tue, 09 Jan 2001 13:01:50 -0800
Hi Steve, Yes, YS does a freestanding tubular vertical just fine. The only difference between it and half of a yagi element is the loads due to gravity which can easily be accounted for. I used it to
/archives//html/Towertalk/2001-01/msg00234.html (8,120 bytes)

32. [TowerTalk] Reality Check (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Fri, 19 Jan 2001 16:26:09 -0800
Hi Sylvan, I think your planned installation will exceed the tower rating. You have the wrong antenna areas for evaluating the tower. The Rohn allowable areas are projected areas (see Dwg C870484 R4
/archives//html/Towertalk/2001-01/msg00513.html (12,926 bytes)

33. [TowerTalk] G5RV or Dipoles (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Wed, 31 Jan 2001 12:50:33 -0800
Ted, I agree with the recommendations to go with two dipoles on a common feed point. I have two 40/80 inverted vees like this, apex @ 45', one for each radio, and they work great on just about anythi
/archives//html/Towertalk/2001-01/msg00755.html (11,237 bytes)

34. [TowerTalk] Feeding tower on 80 (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Wed, 08 Dec 1999 21:45:32 -0800
Hi Bob and all, Good comments from others about this. Information exists in the ON4UN and ARRL books. The coverage in ON4UN's is more complete. I recently did this on a silly little AB577 surplus guy
/archives//html/Towertalk/1999-12/msg00184.html (10,939 bytes)

35. [TowerTalk] Re: The Ultimate One Tower System (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Thu, 16 Dec 1999 09:20:02 -0800
The ultimate antenna collection requires the ultimate tower. Look in the catalogue for the tower that carries 102.6 SqFt. -- 73, Kurt, K7NV -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html
/archives//html/Towertalk/1999-12/msg00323.html (9,392 bytes)

36. [TowerTalk] Re: The Ultimate One Tower System (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Fri, 17 Dec 1999 12:24:54 -0800
Hi Greg, The Big Berthas may be the ultimate by somebody's definition. Maybe someone around here knows what the Bertha's are rated for, I'm pretty sure it not this much. I think one would start shopp
/archives//html/Towertalk/1999-12/msg00349.html (11,086 bytes)

37. [TowerTalk] Re: Model Mania - The ultimate one tower system (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Sat, 18 Dec 1999 17:05:39 -0800
There are plenty of us out here! Thank you for the compliments! Remember to correct those figures to make them useful for evaluating tower loads. The 3 x C3 stack is 25.2 SqFt. The 2 x C31XR stack is
/archives//html/Towertalk/1999-12/msg00372.html (8,660 bytes)

38. [TowerTalk] what is the experience with F12 dual-band ants and Nradios? (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Tue, 21 Dec 1999 18:59:23 -0800
Hi Dave, Years ago when we were doing a fair amount of contesting at my Dad's place, W6KUT, we had some front end overload problems with our TS930's. The station had fairly good sized monobanders and
/archives//html/Towertalk/1999-12/msg00411.html (10,187 bytes)

39. [TowerTalk] TS930 mod (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Wed, 22 Dec 1999 07:50:56 -0800
Several questions received about this one. The mod was actually 3 fold, and different than I remembered from 16 years ago. 1) replace jumper on Q93 with XZ-070 Zener 2) Upgrade PIN diodes D15 - D33 w
/archives//html/Towertalk/1999-12/msg00419.html (7,212 bytes)

40. [TowerTalk]ROHN SPECIFICATIONS (score: 1)
Author: K7NV@contesting.com (Kurt Andress)
Date: Sun, 26 Dec 1999 12:36:28 -0800
Happy Holidays Everyone, I think Tom's (N4KG) comments regarding the newer Rohn configurations being inferior to the previous ones are right on target. The only reasons for using a configuration with
/archives//html/Towertalk/1999-12/msg00470.html (18,580 bytes)


This search system is powered by Namazu